489986981189451 has 6 divisors (see below), whose sum is σ = 707758972829220. Its totient is φ = 326657987459628.

The previous prime is 489986981189393. The next prime is 489986981189549. The reversal of 489986981189451 is 154981189689984.

489986981189451 is a `hidden beast` number, since 4 + 8 + 9 + 9 + 8 + 69 + 8 + 11 + 89 + 451 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-489986981189451 is a prime.

It is a super-2 number, since 2×489986981189451² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (489986981199451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27221498954961 + ... + 27221498954978.

It is an arithmetic number, because the mean of its divisors is an integer number (117959828804870).

Almost surely, 2^{489986981189451} is an apocalyptic number.

489986981189451 is a deficient number, since it is larger than the sum of its proper divisors (217771991639769).

489986981189451 is a wasteful number, since it uses less digits than its factorization.

489986981189451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54442997909945 (or 54442997909942 counting only the distinct ones).

The product of its digits is 12899450880, while the sum is 90.

The spelling of 489986981189451 in words is "four hundred eighty-nine trillion, nine hundred eighty-six billion, nine hundred eighty-one million, one hundred eighty-nine thousand, four hundred fifty-one".